Manifold plate of ink jet head
AssigneeBrother Kogyo Kabushiki Kaisha
InventorAtsushi Ito
Life of this patent
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Abstract
Manifold plates 12 are formed with common ink chambers 12a, 12b with protrusions 51 and open-space chambers 50. When a cap 81 abuts against a nozzle surface 43 of a base plate 11 at position shifted from a proper position, the protrusions 51 offer support for the cap 81. Accordingly, an ink jet head 6 can be configured to properly withstand the capping operation without adding any capping margin. End portions of the common ink chambers 12a, 12b adjacent to portions D are formed to have a cross-sectional area that decreases at a fixed rate in association with distance from ink supply holes 19a, 19b. The open-space chambers 50 are shaped for correcting differences in strength in the manifold plates 12 with respect to a lengthwise direction D1.
Claims27
An ink jet head comprising:
- a cavity plate formed with:
- a row of plurality of nozzles, the row extending in a first direction;
- a plurality of pressure chambers in one-to-one correspondence with the plurality of nozzles;
- a common chamber distributing ink to the respective pressure chambers;
- and
- a protrusion protruding into the common chamber.
An ink jet head comprising:
- a cavity plate formed with:
- a row of a plurality of nozzles defining a first plane extending in a first direction and a second direction perpendicular to the first direction;
- a plurality of pressure chambers in one-to-one correspondence with the plurality of nozzles;
- a common chamber located distributing ink to the respective pressure chambers, the common chamber defining a second plane parallel to the first plane;
- an ink supply hole for introducing ink to the common chamber, wherein the common chamber having an end portion with a smaller cross section with a distance from the ink supply hole;
- and
- an open-space chamber formed in adjacent to the end portion of the common chamber, the open-space chamber being formed in the second plane defined by the common chamber.
Dependencies are inferred from the claim text.